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Copper Material in Cables  


Every Material Offers Some Resistance or Opposition to The flow Electric Current Through it, Good Conductors such as Copper and Aluminum Offer Very Little Resistance. Poor Conductors or Insulator Such as Glass, Wood and Paper Offer a High Resistance to Current Flow. 
The Size and type of Materials of the Wire in an Electric Circuit are chosen to keep the electrical resistance as low as possible. In this Way, Current can flow easily through the conductors. 
Temperature also affects the resistance of electrical conductors to some extent. In most conductors the resistance increases with temperature. The relative resistance of several conductors of the same length and cross section metals are arranged in order of ascending resistance.


COPPER  108
GOLD  140
ALUMINUM 180
PLATINIUM 700
LEAD 1350

CONDUCTOR

Conductor of a cable or core. The conducting portion, consisting of a Single wire or of a group of wires Assembled together and in contact with each other or connected in Parallel.

CONDUCTOR MATERIALS AS PER B.S & I.E.C

As per B.S 6360 : 1991
The Conductor shall consist of one of the following:

Plain or Metal-Coated Annealed Copper
Plain or Metal-Coated Hard-Drawn Copper
Plain Aluminum

As per I.E.C 228 :1987
The Conductor may consist of::

Plain or Metal-Coated Annealed Copper;
or Plain or Metal-Coated Aluminum or Aluminum Alloy;
or Metal-Clad Aluminum;
or Metal-Coated Metal-Clad Aluminum.

NOTE

For Cables the  Copper material shall consist of well Annealed
Electrolytic Copper wires. The wires shall be free from oxide flakes
and other defects.

Some Mechanical and Electrical Characteristics of Copper and Aluminum Materials are Given Below:

CHARACTERISTICS OF CONDUCTOR MATERIALS

Characteristics Unit Annealed
Copper
Hard-drawn
Copper
Aluminium
Conductivity % 99.99 97 61
Volume Resistivity
at 20°C
Ohm-mm3 / Mtr. 0.017241 0.017771 0.028264
Maximum
Density at 20°C gram / cm3 8.89 8.89 2.703
Mass resistivity at 20°C Ohm-gram / Mtr. 0.15328 0.15741 0.076398
Resistance at 20°C Ohm-mm2 / km.. 17.241 17.771 28.264
Temperature Coefficient
of Resistance
Per Degree 0.0393 0.0384 0.0403
Ultimate Level stress
(Approximate)
Kg./mm2 25.3 42.2 16.5

THE CHEMICAL COMPOSITION OF COPPER CATHODE PLATE
(RAW MATERIAL OF HARD-DRAWN COPPER ROD)

PRODUCT:                        COPPER CATHODE PLATES.
SPECIFICATION:             TO LME STANDARD
GRADE 99.99% PURITY ( TOLERANCE OF 0.03% )

CHEMICAL COMPOSITION

1 Copper, as Cu 99.99%
2 Cobalt, as Co 0.2 ppm
3 Lead, as Pb 0.2 ppm
4 Iron, as Fe 2.0 ppm
5 Aluminum as Al 0.5 ppm
6 Manganese as Mn 0.1 ppm
7 Nickel, as Ni 0.2 ppm
8 Antimony as Sb 0.1 ppm
9 Arsenic, as As 0.1 ppm
10 Silica, as Si 0.3 ppm
11 Bismuth, as Bi 0.1 ppm
12 Tellurium, as Te 0.1 ppm
13 Silver, as Ag 10.0 ppm
14 Selenium, as Se 0.3 ppm
15 Sulphur, as S 4.0 ppm
16 Magnesium, as Mg 0.4 ppm
 
   
   

 


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